Abstract
The paper presents the results obtained on cylindrical Ultra High Performance Fibre Reinforced Concrete specimens with diameter of 30mm and a height of 60mm under compression at high stress rate (1.7–2.3 TPa/s). Four different percentages of fibre reinforcement are considered (1, 2, 3, and 4% fibre content) and compared with the results of the matrix (UHPC). A slight reduction of the strength and fracture time with the introduction of fibres is observed. The experimental results are analysed and discussed with the intent to better understand the mechanical behaviour of UHPFRC materials in case of dynamic event under service loading conditions.
Highlights
The innovation of the construction industry has to forcedly pass through the innovation of the building materials
Since early nineties Ultra High Performance Fibre Reinforced Concrete (UHPFRC) is one of the most promising material to be used in these cases
The experimental results are analysed and discussed with the intent to better understand the mechanical behaviour of UHPFRC materials in case of dynamic event under service loading conditions
Summary
The innovation of the construction industry has to forcedly pass through the innovation of the building materials. UHPFRC exhibits extraordinary mechanical and durability characteristics in comparison to the traditional concrete The experiments have been carried out by means of the uniaxial version of a new machine called 3DModified Hopkinson Bar (3D-MHB) It is a Modified Hopkinson Bar apparatus [4,5,6,7,8,9,10] designed to apply dynamic loading in materials having a tri-axial stress state [11]. The experimental results are analysed and discussed with the intent to better understand the mechanical behaviour of UHPFRC materials in case of dynamic event under service loading conditions
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